Xueming Yang, Craig F. Drury, W. D. Reynolds, Mary-Anne Reeb
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引用次数: 0
Abstract
The economic viability of using summer-seeded legume cover crops (crimson clover, red clover, hairy vetch) as a primary nitrogen (N) source for an organic corn (Zea mays L.)-soybean (Glycine max (L.) Merr.)-winter wheat (Triticum aestivum L.) rotation was determined on a sandy loam soil in southwestern Ontario, Canada, by comparing gross profit for organic production (organic sources of N and phosphorus, no herbicides) to conventional production (no cover crops, synthetic fertilizers and herbicides added). Profits were determined for the initial three-year transition period from conventional to organic production (2015-2017), and for five years of certified organic production (2018-2022). During the transition period when conventional crop prices applied to both production systems, organic production profits (CAD $1148-1869 ha-1 per rotation) were lower than conventional profits (CAD $2126 ha-1 per rotation). During the certified organic period when price premiums were applied, organic soybean and corn profits (CAD $1995-2274 ha-1 and $2819-3195 ha-1 per year, respectively) were significantly greater than conventional soybean and corn profits (CAD $536 ha-1 and $1926 per ha-1, respectively). Winter wheat profits were slightly higher for organic production (CAD $426 to $825 ha-1 per year) than for conventional production (CAD $371 ha-1 per year). During the certified organic production period, profits from the three year rotations were CAD $5533-6153 ha-1 for organic production, and CAD $2860 ha-1 for conventional production. It was concluded that an organic rotation of corn-soybean-winter wheat/legume cover crop can be economically viable and more profitable than conventional production on sandy loam soil in southwestern Ontario.
期刊介绍:
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.